Would you believe that Mr. Sebastian is a disguise expert capable of taking on such wildly divergent forms as that of a bikini-clad woman (similar to George Robinson), a walrus, or even the Eiffel Tower?
Note: This name appears only in the book Would You Believe . . . ? by Don Adams. On the uncertain assumption that the book is canonical, this may be relative of Alexei Sebastian, or simply a mistaken reference to him.